[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: tapping hardware & software
Hi Daniele,
maybe the following will work for you:
Use a cheap microphone as the sensor, and record the tapping with the
mic close to the tapping hand/stick/....
Playback of the stimulus and recording of the tapping can be done using
PD (http://puredata.info/).
The recorded tapping signal needs a bit of post-processing:
Octave (http://www.gnu.org/software/octave/) can be used to filter out
unwanted low-frequency noise, and to get the onset times of each tap
(with a processing similar to note onset detection, but simple local
maxima search and thresholding and having a condition of a minimum tap
interval can work well, depending on your recording situation).
From octave, you can export the onset times (or the intervals between
stimuli and onset, or ...) into a text-file or something like this, and
import into your analysis software. Or you use octave for the analysis.
All the best
Christian
Am 24.03.2011 09:32, schrieb daniele schon:
Dear all,
I am trying to think to a simple and cheap solution to record children
in a tapping task (eg along with a metronome or a piece of music).
I have up to now found several solutions commonly used, but none of
them is cheap. For instance, using a software such as Presentation to
send the auditory stimulus and record with the space bar (requires
Presentation/E-Prime license), or using Cakewalk and a tapping pad
(requires Cakewalk license and a tapping pad).
So I would be glad if you could share your advice on the "optimal"
solution, optimizing the real cost (in euros), the precision (in
milliseconds) and the other cost (the hours I'll spend analyzing data,
for instance recording the tapping on a microphone ...).
my warmest regards
daniele
--
Dr.-Ing. Christian Uhle
IIS Labs
Dept. Audio
Fraunhofer Institute for Integrated Circuits IIS
Am Wolfsmantel 33
91058 Erlangen
Germany
E-mail: christian.uhle@xxxxxxxxxxxxxxxxx
Phone: +49(0) 9131 / 776 - 6230
Fax: +49(0) 9131 / 776 - 6099
http://www.iis.fraunhofer.de/amm/
Meet us at these events:
Workshop Digital Broadcasting, September 15-16, 2010
CEATEC Tokyo, Oktober 06-09, 2010
Medientage Munich, Oktober 13-15, 2010
...